Published In J. Phys. G: Nucl. Part. Phys. Date Tue, 07/04/2017 - 12:00 Volume 44 Pages 084006 (28 pp) DOI 10.1088/1361-6471/aa78e0 Paper Category Review Author(s) V. Fedosseev K. Chrysalidis T. Day Goodacre B. Marsh S. Rothe C. Seiffert K. Wendt